Today for the first time in years I saw a "Promotions" panel at the right side of an opened Gmail message. This despite Adbock Plus in my Firefox and the userscript Remove All Gmail Ads. It was like finding a big fat cockroach in your food.
This script, once added, did the trick. Thank you!
Does what it says and removes all the annoying gmail ads.
Does exactly what it says. No more gmail ads!!!
Works very fine !